Screw-driver.



lf. KIETUNSKI.

SCREW Dawes. APPLICATION `ELED APR. I9. 1917.

Lpm mem@ Feb. 112i 1918.

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KIETLINSKI, 0F MILWAUKEE, WSCNSN.

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specification of Lettera Fatent.

Patented Feb. 12, 11.91%..

Application med April 18, 1917. erial No. 163,251. i

To all rwtom if may' concern:

Be it known that l, FELIX Km'rmnsnr, a citizen of the United States, residing at Milwaukee. in the county of Milwaukee and State of Wisconsin, have invented certain new and useful improvements in Screw- Drivers, of which the following 1s a specli'ication.

This invention relates to molders tools and has special reference to a draw screw holder.

1t is a well known fact that in the process of molding, patterns are employed which are bedded in green sand, loam or the like, the bedding material being usually held 1n what is known as a flask. After the pattern has been properly bedded it must then be withdrawn. Now, inasmuch as patterns are frequently bedded so that their upper surface is level with the sand the withdrawal ot' the pattern, especially in two-part patterns where the upper 'surface is a plane,

it becomes a matter of some diiiiculty. U11- der ordinary circumstances it is usual to drive the tang of a file or the like into the pattern so that it may be lifted without disturbing. to any great extent, the molding material. However, this driving operation always results in some disturbance of the molding material and in addition it frequently happens that the pattern is injured and that the tool can not be driven rmly enough to lift the pattern.

In order to obviate this l have invented a simple tool for inserting a screw in a pattern, the screw being of the type usually employed with wood or being used in connection with a plate having` a threaded opening and being in the form of a machine screw. 4'lthis tool is also used as a handle to lift the pattern.

One important object of the invention is therefore to provide an improved and sim plified tool adapted to insert a screw in a pattern and at the same time to act as a handle to lift the pattern out of the mold.

`7i/ith the above and other objects in view, as will be hereinafter apparent the invention consists in general of certain novel details of `constructlon and combinations of parts hereinafter fully described, illustrated in the accompanying drawing, and specifically claimed.

ln the laccompanying drawing, like characters of reference indicate like parts in the several views, and

Figure 1 is a side elevation of a tool constructed in accordance with this invention.

Fig. 2 is a vertical median section through such a tool the view being partly in elevation.

Fig. 3 is a section on the line 3 3 of Fig. 2.

Fig. 4 is a section on the line 4-4 ot' 2. 1g. 5 is a detail perspective view ot one form ofscrew holder for holding wood screws.

Fig. 6 is a modified form of screw holder especially adapted for holding machine screws.

In the embodiment of 'the invention herein illustrated there has been shown a tool which comprises a body having a hollow cylindrical upper portion 10 which is threaded interiorly as at 11. r1`he lower portion of this body is of inverted frusto-conical form and is provided with slots 12 where through the ngers may be inserted for purposes hereinafter to be described. The

ottom end of the body is composed ot a. hollow cylindrical sleeve 13 threaded eateriorly.

Screwed into the upper portion 10 of said body is a sleeve 14C wherethrough extends a boss 15 which forms the journal ot a revolua ble handle 16. Moreover, the boss 15 is ot especially adapted such length that a nut 17 may be screwed y on its lower end and when so positioned maypperrnit longitudinal movement of the boss 15 through the sleeve 14. in the lower end of this boss 15 is a bit socket 17 wherein is' fitted the polygonal end ot a bit 18 which extends downward through the end 13, the bit being thus removable and its removal being eected by gripping thel shank of the bit through the slots 12 with the ngers.

Screwed on the lower end of the body is a screw holder or support 19 which has at one side an opening 20 below which is a seat 21 for the head of a screw 22. lt will be noted that the form shown in Figs. 2 and 5 shows the seat 21 beveled so that the head of an ordinary wood screw may be received thereon while in the form shown in Fig. 6 the seat is square to conform to the fiat undersurface of the head of amachine screw.

In the operation of thedevice a suitable bit 18 is inserted in the bit socket and the handle 16 is raised. A screw is then slipped into the holder and the handle 16 depressed until the point of the bit 18 seats in the kerf of the'screw 22. The point of the screw is then set onA the pattern and the body gripped with the left hand while the right hand is used to rotate the handle 16 and thus force the screw into the pattern. After the screw is in position the handle 16 may be lifted which will result in the pattern also being lifted. Moreover, it will be noticed that the device may be readily detached from the screw after it has been inserted so that the screw may be lifted, if desired, in position in the pattern ready for the` attachment of the device to lift the pattern.

There has thus been provided a simple and eliicient device of the kind described and for the purpose specified.

It is obvious that many minor changes may be made in the form and construction of the invention without departing from the material principles thereof. 1t is not therefore desired to conine the invention to the exact form herein shownand described but it is wished to include all such as properlyr come within the scope claimed.

Having thus described the invention, what is claimed as new, is

In a draw screw holder, a hollow body internally threaded at its upper end, a sleeve screwed into said upper end, a handle having a boss extending through said sleeve and rotatable therein, said boss being also movable longitudinally in the sleeve and provided at its lower end with a bit socket, a nut on the lower end of the boss limiting its longitudinal movement, a screw holder removably Vthreaded on the lower end of the body, and a bit removably mounted in the socket and extending downward into the screw holder.

In testimony whereof I affix my signature.

FELIX KIETLINSKI.

Witnesses S. S. LUKAszEwIcz, W. J. LUKAszEwroz. 

